Aircraft tug without tow bar

Abstract

An aircraft tug without draw tongue, with a chassis divided by means of an axially parallel buckling axle. The pickup device for the nose landing gear (nose wheels 27) of an aircraft is arranged within the fork-shaped recess of the chassis, which is formed by the lifting rockers. This pickup device includes a lifting platform, a pendulum tie-bar, telescopic arms with gripping arms, a push-out tie-bar, a crossbar, longitudinal swinging arms, and a pendulum pin. The pendulum tie-bar, the lifting platform with the telescopic arms, including the push-out tie-bar and the longitudinal swinging arms, are connected to the lifting rockers of the chassis rear part via coupling members. The pendulum tie-bar has a pendular mounting, and pendular movement of the lifting platform and of the pendulum tie-bar is guaranteed in conjunction with the pivotably mounted lifting platform. Since the height-adjustable telescopic arms are pivotably linked to the lifting platform and to the pendulum tie-bar, they are able to participate in the pendular movement.

What is claimed is: 
     
       1. An aircraft tug without tow bar, comprising: a front chassis part and a rear chassis part, the front and rear chassis parts being divided by an axile parallel buckling axle, the front chassis part having a front axle provided as a driven axle fastened to the front chassis part, the rear chassis part being provided as a fork-shape to provide a recess for picking up a nose wheel of an aircraft;   a pick up device provided connected to the front chassis part within the recess, the pick up device including a lifting platform with a support surface for the nose wheel, a pendulum tie-bar, telescopic arms with gripping arms, a push-out tie-bar, a crossbar, longitudinal swinging arms and a pendulum pin, the lifting platform, the pendulum tie-bar and the telescopic arms being mechanically connected to the crossbar via the pendulum pin, the pendulum tie-bar being able to perform a pendular movement in each of two directions of movement around the pendulum pin;   vertical drag bearings connecting said lifting platform to said pendulum tie-bar;   pivoting bearings connected to the longitudinal swinging arms for (guaranteeing) providing the longitudinal swinging arms with degrees of freedom;   first drag bearings connected to the telescopic arms whereby the telescopic arms may be pivoted;   further drag bearings connected to the crossbar whereby the crossbar may be moved;   lifting rockers connected to the rear chassis part;   a shifting device connected between said front chassis part and said push-out tie-bar;   coupling members, said lifting rockers being connected to the pick-up device by said coupling members;   bearings on each side of each of the coupling members whereby the each coupling member can be pivoted around one of the bearings, each lifting rocker being pivotable around a bearing of the buckling axle, the longitudinal swinging arms being deflected in a corresponding direction of the pendular movement during the pendular movement of the pendulum tie-bar around the pendulum pin, whereby the lifting platform performs a vertical pivoting movement via said vertical drag bearings, the telescopic arms with gripping arms and the push-out tie-bar with the shifting device are linked to the lifting platform by means of said first drag bearings on said pendulum tie-bar and via adjusting members and said crossbar is linked to the front part of the chassis via said further drag bearings.   
     
     
       2. Aircraft tug in accordance with claim 1, wherein the coupling members are adjustable in length.